Phosphoric acid monester salts

ABSTRACT

The invention relates to new compounds of the general formula I ##STR1## wherein R 1  is a straight or branched chained alkyl having 1 to 13 carbon atoms, optionally substituted with halogen, alkoxyalkyl containing 1 to 5 carbon atoms in the alkoxy and 1 to 4 carbon atoms in the alkyl moiety or phenyl; 
     R 2  is alkyl having 6 to 20 carbon atoms; alkoxyalkyl, phenoxyalkyl, furfuryl, cyclopropyl-alkyl, cyclopentyl, cycloheptyl, thiazolyl, triazolyl, thiazolinyl, pyridinyl, picolyl, benzimidazolyl, piperonyl, pirimidinyl, chlorobenzothiazolyl, benzyl, phenyl substituted with chloro and/or amino, or amino and alkyl, or amino and nitro groups, alkenyl, alkinyl, aminoalkyl, dialkylamino-alkyl, alkylaminoalkyl, alkylphosphonateammoniumalkyl, 3,5-dichlorophenyl-hidantoinyl, or thiadiazolyl optionally substituted with alkyl; 
     R 3  is hydrogen, phenyl, benzyl, alkenyl, alkyl, hydroxy, alkoxy or alkoxyalkyl; or 
     R 2  and R 3  together stand for a 3,5-dichlorophenyl-hidantoinyl group; 
     R 4  is hydrogen or alkyl optionally substituted with hydroxyl. 
     The new phosphoric acid monoester salts of the general formula I show fungicidal activity. The fungicidal compositions containing said compounds as active ingredients are also within the scope of the invention. According to a further aspect of the invention there is provided a process for the preparation of the new compounds.

This is a continuation of application Ser. No. 781,306, filed Sept. 27, 1985, which, in turn, is a continuation of application Ser. No. 541,109, filed Oct. 12, 1983, which, in turn is a continuation of application Ser. No. 296,560, filed Aug. 26, 1981, all now abandoned.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The invention relates to new phosphoric acid monoester salts, a process for their preparation and fungicidal compositions containing said compounds as active ingredient.

2. Description of the Prior Art

Compounds having such fungicidal properties are reported in the following publications: Journal of Gen. Chem. USSR, 42, 1924 (1972); Chemical Abstracts 11074e, 1966; Houben-Weyl: Org. Chem. XII/2; Chem. Ber. 90, 811; Published Hungarian Patent Application Nos. PE-940, PE-936 and PI-670.

In the published Hungarian Patent Application No. PE-940, fungicially active compounds of the general formula A are disclosed. ##STR2## In the general formula A R stands for a straight or branched chained alkyl group having 1 to 18, preferably 1 to 8 carbon atoms, optionally substituted with halogen; alkenyl or alkinyl having 1 to 8, preferably 1 to 5 carbon atoms; alkoxyalkyl containing 1 to 5 carbon atoms in the alkoxy moiety and 1 to 4 carbon atoms in the alkyl moiety; cycloalkyl having 3 to 6 carbon atoms; phenyl, phenyl substituted with alkyl having 1 to 4 carbon atoms or tetrahydrofurfuryl;

M is hydrogen, an ammonium cation, optionally substituted with 1 to 4 alkyl having 1 to 5 carbon atoms, hydroxyalkyl having 1 to 5 carbon atoms or phenyl; an alkali metal cation, preferably sodium or potassium ion; an alkali earth metal cation, preferably magnesium, barium or calcium ion or a multivalent metal cation, preferably zinc, manganese, cupro, cupri, iron, nickel or aluminum ion; and

n represents a number equivalent to the valence of M.

SUMMARY OF THE INVENTION

We have surprisingly found that the fungicidal activity of the new compounds of the general formula I hereinbelow, according to the invention, surpasses the activity of the commercially available known compounds of the general formula A.

More particularly, the new phosphoric acid monoester salts of the present invention have the general formula I ##STR3## wherein R₁ is a straight or branched chained alkyl group having 1 to 13 carbon atoms, optionally substituted with halogen; an alkoxyalkyl group containing 1 to 4 carbon atoms in the alkyl moiety and 1 to 5 carbon atoms in the alkoxy moiety or a phenyl group;

R₂ is alkyl having 6 to 20 carbon atoms; alkoxyalkyl, phenoxyalkyl, furfuryl, cyclopropyl-alkyl, cyclopentyl, cycloheptyl, thiazolyl, triazolyl, thiazolinyl, pyridinyl, picolyl, benzimidazolyl, piperonyl, pirimidinyl, chlorobenzothiazolyl, benzyl, phenyl substituted with chloro and/or amino, or amino and alkyl, or amino and nitro groups, alkenyl, alkinyl, aminoalkyl, dialkylamino-alkyl, alkylaminoalkyl, alkylphosphonateammoniumalkyl, 3,5-dichlorophenyl-hidantoinyl or thiadiazolil optionally substituted with alkyl;

R₃ is hydrogen, phenyl, benzyl, alkenyl, alkyl, hydroxy, alkoxy or alkoxyalkyl; or

R₂ and R₃ together stand for a 3,5-dichlorophenyl-hidantoinyl group;

R₄ is hydrogen or alkyl optionally substituted with hydroxyl.

Though structurally closely related compounds are known in the art and their fungicidal activity has also been reported, compounds of the general formula I, wherein R₁, R₂, R₃ and R₄ are as hereinabove described, are new.

In the definition of R₂ the phenoxyalkyl groups preferably contain 1 to 5 carbon atoms in the alkyl moiety, the alkenyl and alkinyl groups preferably have 2 to 5 carbon atoms, the aminoalkyl groups preferably have 1 to 10 carbon atoms in the alkyl moiety, in the alkylamino and dialkylamino groups the alkyl moieties preferably contain 1 to 6, more preferably 1 to 4 carbon atoms, and the alkyl substituents of the phenyl and thiadiazolyl groups preferably contain 1 to 6, more preferably 1 to 4 carbon atoms.

In the definition of R₃ the preferred alkyl substituents contain 1 to 13, more preferably 1 to 4 carbon atoms, the alkenyl groups preferably have 2 to 5, the alkoxy groups 1 to 4 carbon atoms, and the alkoxyalkyl groups preferably have 1 to 4 carbon atoms both in the alkoxy and in the alkyl moieties.

In the definition of R₄ the alkyl groups preferably have 1 to 13, more preferably 1 to 8, most preferably 1 to 6 carbon atoms.

DESCRIPTION OF THE PREFERRED EMBODIMENT

The compounds of the general formula I can be prepared by methods known in the art. Of these methods the followings should be particularly mentioned:

(a) a compound of the general formula II ##STR4## wherein R₁ is an hereinabove defined, is reacted with a compound of the general formula III ##STR5## wherein R₂, R₃ and R₄ are as defined hereinabove, or with a hydrochloride or hydrobromide thereof;

(b) a compound of the general formula IV ##STR6## wherein R₁ is as hereinabove mentioned, is reacted with a compound of the general formula III, wherein R₂, R₃ and R₄ have the same meaning as defined above; or

(c) a compound of the general formula V ##STR7## R₁ is as defined above, is reacted with a compound of the general formula VI ##STR8## wherein R₂, R₃ and R₄ have the same meaning as defined above.

The process variant (a) is generally performed in an aqueous or organic reaction medium or in a mixture of water and a water-miscible organic solvent. The reaction temperature can be varied in a wide range, depending on the reactants used, but preferably is between 0° C. and 150° C., more preferably 20° C. and 110° C.

The process variant (b) preferably is carried out in an organic solvent. As an organic solvent for example benzene, toluene, xylene, chloroform, trichloroethylene can be employed. The reaction temperature can be varied in a wide range depending on the reactants used, but preferably is between 0° C. and 120° C.

The process variant (c) preferably is accomplished in an aqueous medium. The reaction temperature can be varied in a wide range, but preferably is between 0° C. and 100° C., more preferably 5° C. and 35° C.

Preferred representatives of the phosphoric acid monoester salts of the general formula I are listed in the following Table I. The Table also contains the method used for the preparation of these compounds and their physical constants.

                                      TABLE I                                      __________________________________________________________________________                     Process                                                                             Yield                                                                              Melting point                                                                           P (%)     N (%)                              Compound No.    variant                                                                             (%) n.sub.D  calculated                                                                           found                                                                              calculated                                                                           found                        __________________________________________________________________________     (1)                                                                               3-isononyloxypro-                                                                           a    94.8                                                                               n.sub.D.sup.29 = 1,4482                                                                 10.42 10.30                                                                              4.71  4.57                            pyl-ammoniumme-                                                                thyl phosphonate                                                            (2)                                                                               3-ethoxypropyl-                                                                             a    98.9                                                                               n.sub.D.sup.27 = 1,4427                                                                 15.56 15.37                                                                              7.03  6.94                            ammoniummethyl                                                                 phosphonate                                                                 (3)                                                                               3-methoxypropyl-                                                                            a    99.9                                                                               n.sub.D.sup.30 = 1,4449                                                                 16.73 16.45                                                                              7.56  7.14                            ammoniummethyl                                                                 phosphonate                                                                 (4)                                                                               3-butyloxypropyl-                                                                           a    99.4                                                                               n.sub.D.sup.30 = 1,4420                                                                 13.64 13.63                                                                              6.16  6.06                            ammoniummethyl                                                                 phosphonate                                                                 (5)                                                                               3-ethoxypropyl-                                                                             a    99.9                                                                               n.sub.D.sup.22 = 1,4445                                                                 14.53 14.05                                                                              6.56  6.69                            ammoniumethyl                                                                  phosphonate                                                                 (6)                                                                               3-methoxypropyl-                                                                            a    94.3                                                                               n.sub.D.sup.30 = 1,4440                                                                 15.56 15.48                                                                              7.03  7.17                            ammoniumethyl                                                                  phosphonate                                                                 (7)                                                                               3-isononyloxy-                                                                              a    97.9                                                                               n.sub.D.sup.30 = 1,4405                                                                  9.95  9.73                                                                              4.49  4.28                            propyl-ammonium-                                                               ethyl phosphonate                                                           (8)                                                                               3-butyloxypropyl-                                                                           a    95.7                                                                               n.sub.D.sup.30 =1,4438                                                                  12.84 12.05                                                                              5.80  5.27                            ammoniumethyl                                                                  phosphonate                                                                 (9)                                                                               furfuryl-ammonium-                                                                          a    90.5                                                                               112-115° C.                                                                      16.04 15.97                                                                              7.25  7.14                            methyl phospho-                                                                nate                                                                        (10)                                                                              cyclopentyl-ammo-                                                                           a    99  n.sub.D.sup.30 = 1,4463                                                                 17.10 16.93                                                                              7.73  7.35                            niummethyl phos-                                                               phonate                                                                     (11)                                                                              1-methyl-2-phenoxy-                                                                         a    81.9                                                                               95-96° C.                                                                        11.86 11.27                                                                              5.36  5.29                            ethyl-ammoniumethyl                                                            phosphonate                                                                 (12)                                                                              diallyl-ammonium-                                                                           a    93.4                                                                               n.sub.D.sup.30 = 1,4562                                                                 14.95 15.02                                                                              6.75  6.05                            ethyl phosphonate                                                           (13)                                                                              allyl-ammonium-                                                                             a    73,0                                                                               n.sub.D.sup.25 = 1,4517                                                                 18,54 18,40                                                                              8,37  8,52                            ethyl phospho-                                                                 nate                                                                        (14)                                                                              1-propinyl-3-di-                                                                            a    60,5                                                                               n.sub.D.sup.30 = 1,4481                                  methyl-ammonium-                                                               ethyl phospho-                                                                 nate                                                                        (15)                                                                              methyldiallyl-                                                                              a    66,4                                                                               n.sub.D.sup.30 = 1,4462                                  ammoniumethyl                                                                  phosphonate                                                                 (16)                                                                              thiazolyl-2-am-                                                                             a    95,1                                                                               n.sub.D.sup.25 = 1,5068                                                                 14,76 14,57                                                                              13,32 13,20                           moniumethyl                                                                    phosphonate                                                                 (17)                                                                              pryidinyl-2- a    95,5                                                                               n.sub.D.sup.25 = 1,5092                                                                 15,18 15,05                                                                              13,72 13,60                           ammoniumethyl                                                                  phosphonate                                                                 (18)                                                                              pyridinyl-4-am-                                                                             a    84  n.sub.D.sup.25 = 1,5213                                                                 15,18 15,02                                                                              13,72 13,60                           moniumethyl                                                                    phosphonate                                                                 (19)                                                                              pyridinyl-3-am-                                                                             a    98,9                                                                               n.sub.D.sup.25 = 1,5213                                                                 15,18 15,03                                                                              13,72 13,60                           moniumethyl                                                                    phosphonate                                                                 (20)                                                                              3-picolyl-am-                                                                               a    93,0                                                                               n.sub.D.sup.27 = 1,5130                                                                 14,20 14,03                                                                              12,83 12,34                           moniumethyl                                                                    phosphonate                                                                 (21)                                                                              thiazolinyl-2-                                                                              a    97,0                                                                               n.sub.D.sup.25 = 1,5202                                                                 14,60 14,22                                                                              13,20 13,07                           ammoniumethyl                                                                  phosphonate                                                                 (22)                                                                              cyclopentyl- a    91,7                                                                               n.sub.D.sup.30 = 1,4622                                                                 15,87 15,69                                                                              7,17  7,19                            ammoniumethyl                                                                  phosphonate                                                                 (23)                                                                              3,4-dichlorophe-                                                                            a    72,5                                                                               64-66° C.                                                                        11,39 11,12                                                                              5,14  5,11                            nyl-ammonium-                                                                               b    52,8                                                                               66.67° C.                                                                        11,39 11,07                                                                              5,14  5,11                            ethyl phosphonate                                                           (24)                                                                              3'-(3,5-dichloro-                                                                           a    62,0                                                         phenyl)-hydantoi-                                                              nethyl phospho-                                                                nate                                                                        (25)                                                                              2-benzimidazolyl-                                                                           a    95,0                                                                               155-160° C.                                                                      12,74 12,25                                                                              17,27 16,90                           ammoniummethyl                                                                 phosphonate                                                                 (26)                                                                              2-methoxy-ethyl-                                                                            a    84,5                                                                               n.sub.D.sup.30 = 1,4425                                                                 16,73 16,38                                                                              7,56  7,42                            ammoniummethyl                                                                 phosphonate                                                                 (27)                                                                              1,2,4-triazolyl-                                                                            a    89,6         15,96 15,07                                                                              28,85`                                                                               29,30                           2-ammoniumethyl                                                                phosphonate                                                                 (28)                                                                              furfuryl-ammonium-                                                                          b                 10,64     4,81                                  octyl phospho-                                                                 nate                                                                        (29)                                                                              furfuryl-ammonium-                                                                          b                                                                 tridecyl phospho-                                                              nate                                                                        (30)                                                                              furfuryl-ammonium-                                                                          a    95,4                                                                               n.sub.D.sup.30 = 1,4648                                                                 14,01 14,27                                     isopropyl phos-                                                                phonate                                                                     (31)                                                                              furfuryl-ammonium-                                                                          b                                                                 1-methoxy-2-propyl                                                             phosphonate                                                                 (32)                                                                              furfuryl-ammonium-                                                                          b                                                                 phenyl phosphonate                                                          (33)                                                                              2-aminophenyl-ammo-                                                                         c                                                                 niumoctyl phos-                                                                phonate                                                                     (34)                                                                              3-aminophenyl-ammo-                                                            niumoctyl phospho-                                                             nate                                                                        (35)                                                                              3-nitro-2-aminophenyl-                                                         ammoniumoctyl phos-                                                            phonate                                                                     (36)                                                                              2,6-dichloro-4-amino-                                                          phenyl-ammoniumoctyl                                                           phosphonate                                                                 (37)                                                                              2,4-dimethyl-6-amino-                                                          phenyl-ammoniumoctyl                                                           phosphonate                                                                 (38)                                                                              3-aminopropyl-ammo-                                                                         a    95,5                                                                               n.sub.D.sup.26 = 1,4688                                                                 16,82 16,70                                                                              15,20 14,90                           niumethyl phosphonate                                                       (39)                                                                              2-aminopropyl-ammonium-                                                                     a    95,1                                                                               n.sub.D.sup.26 = 1,4642                                                                 16,82 16,90                                                                              15,20                                 ethyl phosphonate                                                           (40)                                                                              6-aminohexyl-                                                                               a    98,9                                                                               n.sub.D.sup.26 = 1,4678                                                                 13,69 13,11                                                                              12,38 12,10                           ammoniumethyl                                                                  phosphonate                                                                 (41)                                                                              3-dimethyl-amino-                                                                           a    94,6                                                                               n.sub.D.sup.26 = 1,4536                                                                 14,60 14,78                                                                              13,19 12,90                           propyl-ammonium-                                                               ethyl phosphonate                                                           (42)                                                                              nonyl-ammonium-                                                                             a    97,5                                                                               n.sub.D.sup.29 = 1,4430                                                                 12,24 12,10                                                                              5,53                                  ethyl phosphonate                                                           (43)                                                                              tetradecyl-ammo-                                                                            a    99,8                                                                               45-46° C.                                                                         9,58 10,12                                                                              4,33  4,50                            niumethyl phos-                                                                phonate                                                                     (44)                                                                              hexadecyl-ammonium-                                                                         a    97,0                                                                               50-52° C.                                                                         8,82  8,92                                                                              3,98  4,10                            ethyl phosphonate                                                           (45)                                                                              octadecyl-ammo-                                                                             a    93,2                                                                               54-56° C.                                                                         8,17  8,69                                                                              3,69  3,68                            niumethyl phospho-                                                             nate                                                                        (46)                                                                              pentadecyl-ammo-                                                                            a    99,5                                                                               48-52° C.                                                                         9,18  9,04                                                                              4,15  4,11                            niumethyl phospho-                                                             nate                                                                        (47)                                                                              decyl-ammoniumeth-                                                                          a    98,7                                                                               n.sub.D.sup.23 = 1,4472                                                                 11,59 11,55                                                                              5,23  4,99                            yl phosphonate                                                              (48)                                                                              piperonyl-ammonium-                                                                         a    97,6                                                                               57-59° C.                                                                        11,87 11,60                                                                              5,36  5,26                            ethyl phosphonate                                                           (49)                                                                              bis(2-methoxyethyl)-                                                                        a    92,0                                                                               n.sub.D.sup.25 = 1,4460                                                                 12,74 12,73                                                                              5,76  5,86                            ammoniumethyl phos-                                                            phonate                                                                     (50)                                                                              cycloheptyl-ammo-                                                                           a    99,0                                                                               n.sub.D.sup.23 = 1,4736                                                                 13,86 13,81                                                                              6,27  6,20                            niumethyl phospho-                                                             nate                                                                        (51)                                                                              2-ethyl-1-hexyl-am-                                                                         a    98,3                                                                               n.sub.D.sup.25 = 1,4472                                                                 12,95 12,81                                                                              5,85  5,92                            moniumethyl phos-                                                              phonate                                                                     (52)                                                                              bis(2-ethylhexyl)-am-                                                                       a    89,2                                                                               n.sub.D.sup.25 = 1,4530                                                                  8,82  8,86                                                                              3,98  3,92                            moniumethyl phospho-                                                           nate                                                                        (53)                                                                              4-aminophenyl-ammo-                                                                         a    94,0                                                                               190-194° C.                                                                      14,21 14,00                                                                              12,84 12,80                           niumethyl phospho-                                                             nate                                                                        (54)                                                                              2-aminophenyl-                                                                              b    53,7                                                                               87-91° C.                                                                         8,32  8,28                                                                              7,52  7,44                            ammoniumtridecyl                                                               phosphonate                                                                 (55)                                                                              pyrimidinyl-2-am-                                                                           a    96,0         15,10 14,90                                                                              20,48 20,30                           moniummethyl phos-                                                             phonate                                                                     (56)                                                                              4-aminophenyl-am-                                                                           c         98-102° C.                                                                       8,32  8,22                                                                              7,52  7,20                            moniumtridecyl                                                                 phosphonate                                                                 (57)                                                                              hexamethylene-di-                                                                           a    96,3         18,43 18,20                                                                              8,32  8,10                            (ammoniumethyl                                                                 phosphonate)                                                                (58)                                                                              1,2-propane-di-                                                                             a    99,8                                                                               n.sub.D.sup.30 = 1,4619                                                                 21,06 20,90                                                                              9,52                                  (ammoniumethyl-                                                                phosphonate)                                                                (59)                                                                              1,3-propane-di-                                                                             a    98,9                                                                               n.sub.D.sup.30 = 1,4655                                                                 21,06 20,40                                                                              9,52                                  (ammoniumethyl                                                                 phosphonate)                                                                (60)                                                                              N,N--diallyl-sec-                                                                           a    80,7         11,77 12,06                                                                              5,31                                  butyl-ammonium-                                                                ethyl phosphonate                                                           (61)                                                                              N,N--diallyl-ethyl-                                                                         a    85,7          9,70  9,20                                                                              4,38                                  hexyl-ammonium-                                                                ethyl phosphonate                                                           (62)                                                                              furfuryl-ammonium-                                                                          a                                                                 ethyl phosphonate                                                           (63)                                                                              6-chloro-benzo-thia-                                                                        a    99,3                                                         zolyl-2-ammoniume-                                                             thyl phosphonate                                                            (64)                                                                              4-chloro-benzo-thia-                                                                        a                                                                 zolyl-2-ammoniumethyl                                                          phosphonate                                                                 (65)                                                                              N,N--diallyl-ethanol-                                                                       a    98,7                                                                               n.sub.D.sup.30 = 1,4726                                                                 12,33 12,05                                                                              5,57                                  ammoniumethyl phos-                                                            phonate                                                                     (66)                                                                              tridecyl-ammonium-                                                                          a    99,0                                                                               40-41° C.                                                                        10,02  9,98                                                                              4,53  4,37                            ethyl phosphonate                                                           (67)                                                                              dodecyl-ammonium-                                                                           a    95,0         10,49 10,30                                                                              4,74  4,38                            ethyl phosphonate                                                           (68)                                                                              cyclopropyl-meth-                                                                           a    96,1                                                                               n.sub.D.sup.27,5 = 1,4532.sup.                                                          17,11 17,07                                                                              7,73  7,60                            ane-ammonium-                                                                  ethyl phosphonate                                                           (69)                                                                              2-ethyl-1,3,4-thiadia-                                                                      b    98,0                                                                               n.sub.D.sup.25 = 1,5031                                                                 12,96 12,80                                                                              17,56 17,48                           zolyl-5-ammonium-                                                              ethyl phosphonate                                                           (70)                                                                              N--benzyl-isopropyl-                                                                        a    94,5                                                                               n.sub.D.sup.23 = 1,5035                                                                 11,95 11,87                                                                              5,40  5,67                            ammoniumethyl phos-                                                            phonate                                                                     (71)                                                                              dibenzyl-ammonium-                                                                          a    91,7                                                                               82-88° C.                                                                        10,08  9,96                                                                              4,55  4,58                            ethyl phosphonate                                                           (72)                                                                              benzyl-ammoniume-                                                                           a    95,7                                                                               n.sub.D.sup.23 = 1,5145                                                                 14,27 14,12                                                                              6,44  6,34                            thyl phosphonate                                                            (73)                                                                              diphenyl-ammonium-                                                                          a    97,4                                                                               46-47° C.                                                                        11,09 11,07                                                                              5,01  4,99                            ethyl phosphonate                                                           (74)                                                                              N--methyl-N,N--di-tri-                                                                      a    97,2                                                                               n.sub.D.sup.27,5 = 1,4598.sup.                                                           6,13  6,05                                                                              2,77  2,85                            decyl-ammoniumethyl                                                            phosphonate                                                                 (75)                                                                              N,N--dimethyl-2-ethyl-                                                                      a    71,9                                                                               n.sub.D.sup.27,5 = 1,4465.sup.                                                          11,59 11,40                                                                              5,24  5,20                            hexyl-ammoniumethyl                                                            phosphonate                                                                 (76)                                                                              di-tridecyl-ammonium-                                                                       a    96,7                                                                               n.sub.D.sup.27,5 = 1,4585.sup.                                                           6,30  6,20                                                                              2,85  2,80                            ethyl phosphonate                                                           (77)                                                                              3-stearyloxypropyl-                                                                         a    98,2                                                                               49-52° C.                                                                         7,08  7,05                                                                              3,20  3,25                            ammoniumethyl phos-                                                            phonate                                                                     (78)                                                                              3-tridecyloxypropyl-                                                                        a    98,9                                                                               n.sub.D.sup.26,5 = 1,4555.sup.                                                           8,43  8,47                                                                              3,81  3,92                            ammoniumethyl phospho-                                                         nate                                                                        (79)                                                                              trihexyl-ammoniumethyl                                                                      a    99,5                                                                               n.sub.D.sup.26,5 = 1,4505.sup.                                                           8,17  8,10                                                                              3,69  3,85                            phosphonate                                                                 (80)                                                                              dihexyl-ammoniumethyl                                                                       a    99,5                                                                               n.sub.D.sup.25 = 1,4450                                                                 10,49 10,57                                                                              4,74  4,65                            phosphonate                                                                 __________________________________________________________________________

Further details of the invention are illustrated by the following non-limiting examples.

EXAMPLE 1 3-Isononyloxypropyl-ammoniummethyl phosphonate (compound of the formula I)

To a mixture of 11 g. (0.1 moles) of dimethyl phosphite, 20 ml. of water and 20 ml. of methanol a solution of 20.13 g (0.1 moles) of 3-isononyloxypropyl amine in 38 ml. of methanol is added dropwise, in 15 minutes, at room temperature. The reaction mixture is refluxed for 4 hours, whereupon the solvent and the ethylene formed are distilled off in vacuo. 28.2 g. of 3-isononyloxypropyl-ammoniummethyl phosphonate are obtained. Yield: 94.8%

Analysis:

calculated: C 52.49%, H 10.84%, N 4.71%, P 10.42%; found: C 52.29%, H 10.68%, N 4.57%, P10.30%.

According to thin layer chromatography the product is uniform and according to the IR spectrum the structure of the product corresponds to the assumed structure.

Typical IR bands are as follows:

    ______________________________________                                         2900       (wide band) ν NH.sub.3.sup.+                                                               1210 cm.sup.-1                                                                          ν P = O                                  2320       cm.sup.-1 ν PH                                                                             1115     ν C--O--C                                1630                                                                                      δ NH.sub.3.sup.+                                                                         990     ν P--O                                   1540                                                                           1460                                                                           1380       δ CH.sub.2, CH.sub.3                                                                     770     ν.sub.s  P--O--C                         1365                                                                           ______________________________________                                    

EXAMPLE 2 3-Ethoxypropyl-ammoniummethyl phosphonate (compound of the formula (2))

A mixture of 11 g. (0.1 moles) of dimethyl phosphite, 20 ml. of water and 20 ml. of methanol is reacted with a mixture of 10.31 g. (0.1 moles) of 3-ethoxypropyl amine and 30 ml. of methanol as described in Example 1. 19.7 g. of 3-ethoxypropyl-ammoniummethyl phosphonate are obtained. Yield: 98.9%. n_(D) ³⁰ 1.4425.

Analysis:

calculated: C 36.17%, H 9.10%, N 7.03%, P 15.56%; found: C 35.02%, H 9.05%, N 6.94%, P 19.37%.

According to thin layer chromatography the product is uniform.

EXAMPLE 3 3-Methoxypropyl-ammoniummethyl phosphonate (compound of the formula (3))

A mixture of 11 g. (0.1 moles) of dimethyl phosphite, 20 ml. of water and 20 ml. of ethanol is reacted with a mixture of 8.51 g. (0.1 moles) of 3-methoxypropyl amine and 30 ml. of methanol as described in Example 1. 18.5 g. of 3-methoxypropyl-ammoniummethyl phosphonate are obtained. Yield: 99.9%. n_(D) ³⁰ =1.4449.

Analysis:

calculated: C 32.42%, H 8.70%, N 7.56%, P 16.73%; found: C 31.20%, H 8.63%, N 7.14%, P 16.45%.

According to thin layer chromatography the product is uniform. The IR spectrum corresponds to the assumed structure. Typical IR bands are as follows:

    ______________________________________                                         2900       (wide band) ν NH.sub.3.sup. +                                                              1210 cm.sup.-1                                                                          ν P = O                                  2320       cm.sup.-1 ν PH                                                                             1115     ν C--O--C                                1630                                                                                      δ NH.sub.3.sup.+                                                                        1055     ν.sub.as P--O--C                         1540                       990     ν P--O                                   1460                                                                           1380       δ CH.sub.2, CH.sub.3                                                                     770     ν.sub.s P--O--C                          1365                                                                           ______________________________________                                    

EXAMPLE 4 3-Butyloxypropyl-ammoniummethyl phosphonate (compound of the formula (4))

A mixture of 11 g. (0.1 moles) of dimethyl phosphite, 20 ml. of water and 20 ml. of methanol is reacted with a mixture of 13.12 g. (0.1 moles) of 3-butyloxypropyl amine and 30 ml. of methanol as described in Example 1. 22.6 g. of 3-butyloxypropyl-ammoniummethyl phosphonate are obtained. Yield: 89.4%. n_(D) ³⁰ =1.4420

Analysis:

calculated: C 42.27%, H 9.75%, N 6.16%, P 13.64%; found: C 41.38%, H 9.54%, N 6.06%, P 13.63%.

According to thin layer chromatography the product is uniform. The IR spectrum corresponds to the assumed structure. Typical IR bands are as follows:

    ______________________________________                                         2900       (wide band) ν NH.sub.3.sup. +                                                              1210 cm.sup.-1                                                                          ν P = O                                  2320       cm.sup.-1 ν PH                                                                             1115     ν C--O--C                                1630                                                                                      δ NH.sub.3.sup.+                                                                        1055     ν.sub.as P--O--C                         1540                       990     ν P--O                                   1460                                                                           1380       δ CH.sub.2, CH.sub.3                                                                     770     ν.sub.s P--O--C                          1365                                                                           ______________________________________                                    

EXAMPLE 5 3-Ethoxypropyl-ammoniummethyl phosphonate (compound of the formula (5))

A mixture of 13.81 g. (0.1 moles) of diethyl phosphite, 20 ml. of water and 20 ml. of ethanol is reacted with a mixture of 10.31 g. (0.1 moles) of 3-ethoxypropyl amine and 30 ml. of ethanol as described in Example 1. 21.3 g. (99.9%) of 3-ethoxypropyl-ammoniumethyl phosphonate are obtained.

Analysis:

calculated: C 39.42%, H 9.45%, N 6.56%, P 14.53%; found: C 39.20%, H 9.30%, N 6.69%, P 14.05%.

According to thin layer chromatography the product is uniform.

EXAMPLE 6 3-Methoxypropyl-ammoniumethyl phosphonate (compound of the formula (6))

A mixture of 13.81 g. of diethyl phosphite, 20 ml. of water and 20 ml. of ethanol is reacted with a mixture of 8.91 g. (0.1 moles) of 3-methoxypropyl amine and 30 ml. of ethanol as described in Example 1. 18.8 g. of 3-methoxypropyl-ammoniumethyl phosphonate are obtained. Yield: 94.3%. n_(D) ³⁰ =1,4440

Analysis:

calculated: C 36.17%, H 9.10%, N 7.03%, P 15.56%; found: C 35.97%, H 9.28%, N 7.17%, P 15.48%.

According to thin layer chromatography the product is uniform.

EXAMPLE 7 3-Isononyloxypropyl-ammoniumethyl phosphonate (compound of the formula (7))

A mixture of 13.81 g. (0.1 moles) of diethyl phosphite, 20 ml. of water and 20 ml. of ethanol is reacted with a mixture of 20.13 g. (0.1 moles) of 3-isononyloxypropyl amine and 30 ml. of ethanol as described in Example 1. n_(D) ³⁰ =1.4485 (liquid fraction).

Analysis:

calculated: C 53.99%, H 11.0%, N 4.49%, P 9.95%; found: C 53.80%, H 10,97%, N 4,28%, P 9.73%.

According to thin layer chromatography the product is uniform.

EXAMPLE 8 3-Butyloxypropyl-ammoniumethyl phosphonate (compound of the formula (8))

A mixture of 13.81 g. (0.1 moles) of diethyl phosphite, 20 ml. of water and 20 ml. of ethanol is reacted with a mixture of 13.12 g. (0.1 moles) of 3-butyloxypropyl amine and 30 ml. of ethanol as described in Example 1. 23.1 g. of 3-butyloxypropyl-ammoniumethyl phosphonate are obtained. Yield: 95.7%. n_(D) ³⁰ =1.4438

Analysis:

calculated: C 44.79%, H 10.02%, N 5.80%, P 12.84%; found: C 43.87%, H 9.72%, N 5.27%, P 12.05%.

According to thin layer chromatography the product is uniform.

EXAMPLE 11 1-Methyl-2-phenoxy-ethyl-ammoniumethyl phosphonate (compound of the formula (11))

A mixture of 13.81 g. (0.1 moles) of diethyl phosphite, 20 ml. of water and 20 ml. of ethanol is reacted with a mixture of 15.12 g. (0.1 moles) of 1-methyl-2-phenoxyethyl amine and 30 ml. of ethanol as described in Example 1. 21.4 g. of 1-methyl-2-phenoxyethyl-ammoniumethyl phosphonate is obtained. Yield: 81.9%. Melting point: 95°-96° C.

Analysis:

calculated: C 50.56%, H 7.71%, N 5.36%, P 11.86%; found: C 50.09%, H 7.69%, N 5.29%, P 11.27%.

EXAMPLE 12 3,4-Dichlorophenyl-ammoniumethyl phosphonate (compound of the formula (23))

12.0 g. (0.05 moles) of 3,4-dichloroaniline hydrobromide and 21.0 g. (0.15 moles) of diethyl phosphite in 50 ml. of toluene are reacted at 108° C. The ethyl bromide formed is distilled off. After distillation of the solvent and the excess of diethyl phosphite in vacuo a thick, oily residue is obtained, which crystallizes upon addition of ether. 72.5 g. of 3,4-dichlorophenyl-ammoniumethyl phosphonate are obtained. Melting at 64° to 66° C.

Analysis:

calculated: C 35.31%, H 4.44%, P 11.39%, Cl 26.02%, N 5.14%; found: C 35.09%, H 4.08%, P 11.12%, Cl 25.97%, N 5.11%.

According to thin layer chromatography the product is uniform.

EXAMPLE 16 Tetradecyl-ammoniumethyl phosphonate (compound of the formula (43))

To a mixture of 34.6 g. (0.25 moles) of diethyl phosphite, 50 ml. of water and 50 ml. of ethanol a mixture of 53.4 g. (0.25 moles) of tetradecylamine and 70 ml. of ethanol is added. The reaction mixture is refluxed for 4 hours, whereupon the solvent is distilled off in vacuo. 80.7 g (99.8%) of tetradecyl-ammoniumethyl phosphanate are obtained, melting at 45° to 46° C.

Analysis:

calculated: P 9.58%, N 4.33%; found: P 10.12%, N 4.50%.

According to thin layer chromatography the product is uniform.

EXAMPLE 17 Hexadecyl-ammoniumethyl phosphonate (compound of the formula (44))

To a mixture of 34.6 g. (0.25 moles) of diethyl phosphite, 50 ml. of water and 50 ml. of ethanol 60.4 g (0.25 moles) of hexadecyl amine and 70 ml. of ethanol are added. The reaction mixture is refluxed for 4 hours, whereupon the solvent is distilled off in vacuo. 85.2 g. of hexadecyl-ammoniumethyl phosphonate are obtained. Yield: 97.0%. Melting point: 50° l to 52° C.

Analysis:

calculated: P 8.82%, N 3.98%; found: P 8.92%, N 4.10%.

According to thin layer chromatography the product is uniform.

EXAMPLE 18 Octadecyl-ammoniumethyl phosphonate (compound of the formula (45))

To a mixture of 34.6 g. (0.25 moles) of diethyl phosphite, 50 ml. of water and 50 ml. of ethanol a mixture of 67.4 g. (0.25 moles) of octadecyl amine and 70 ml. of ethanol is added. The reaction mixture is refluxed for 4 hours, whereupon the solvent is distilled off in vacuo. 88.5 g. (93.2%) of octadecyl-ammoniumethyl phosphonate are obtained, melting at 54° to 56° C.

Analysis:

calculated: P 8.17%, N 3.69%.

According to thin layer chromatography the product is uniform.

The fungicidally active compounds of the general formula I can be employed within a wide range, depending on the fungi to be treated, on the climatic conditions etc. The treatment is generally performed with solutions containing 0.01 to 10 g. of active ingredient per liter of the solution.

Prior to use the compounds of the general formula I are converted into fungicidal composition, which comprise carriers and optionally surfactants in addition to the active ingredients.

As carriers organic or mineral, natural or synthetic materials can be used. The carriers promote the adsorption of the active compounds on the plants or on the soil and/or make the transport or handling of the compositions easier. Typical solid carriers include clays, natural and synthetic silicates, resins, waxes and solid fertilizers, etc. Typical liquid carriers are water, alcohols, ketones, mineral oil fractions, chlorinated hydrocarbons and condensed gases.

As surface active agents ionic or nonionic emulsifying, dispersin or wetting agents can be used. Suitable surfactants include polyacrylic acid salts and ligninexsulfonic acid salts, and the condensates of ethylene oxide with fatty alcohols, fatty acids and fatty amines.

The compounds of the general formula I and the above additives can be formulated for example as wettable powders, soluble powders, powder sprays, granulates, solutions, emulsifiable concentrates, emulsions, suspended concentrates and aerosols.

Typical powder sprays according to the invention have the following composition:

active ingredient 5-95%

wetting agent 0.2-3%

dispersing agent 2-10%

further additives 0-92.8%

The composition optionally may contain one or more stabilizing agents and/or further additives, e.g. absorption and adhesion promoting agents, anti-clotting agents.

A typical wettable powder according to the invention has the following composition:

active ingredient 50%

calcium-lignine sulfate (dispersing agent) 5%

anionic wetting agent (sodium-isopropyl-naphthalene sulfonate) 1%

silica (anti-clotting agent) 5%

kaoline (filling agent) 39%.

Water-soluble powders can for example be prepared by admixing 20 to 95% by weight of active ingredient with 0 to 10% by weight of an anti-clotting agent. The formulation may further include a water-soluble filling agent, preferably a salt. A typical water-soluble powder has the following composition:

active ingredient 70%

anionic wetting agent (sodium-isopropyl-naphthalene sulfonate) 0.5%

anti-clotting agent (silica) 5%

soluble filling agent (sodium sulphate) 24.5%

A typical wettable powder may have the following composition:

active ingredient 90%

Ethoxylated alcohols having 10 to 16 carbon atoms (wetting agent) 1%

calcium-ligninesulfonate (dispersing agent) 3%

inert filler 6%

According to the invention the compounds of the general formula I may be converted into aqueos dispersions and emulsions as well. Dispersions and emulsions are preferably prepared from wettable powders or emulsifiable concentrated by dilution with water. Water-in-oil and oil-in-water type emulsions can equally be prepared and their consistency is generally thick mayonnaise-like.

The compositions according to the invention optionally contain also further additives, e.g. protecting colloids, sticking and thickening agents, tixotrop agents and stabilizing agents.

The formulation of the compounds of the general formula I into plant protecting compositions is illustrated by the following examples.

EXAMPLE 20 Powder spray containing 3-methoxypropyl-ammoniumethyl phosphonate (compound of the formula (6)) as active ingredient

45% of active ingredient, 49% of Ultra-sil We-3 (silicate), 3% of Dispergiermittel SI (anionactive tenside and carrier) and 3% of Tensiofix LX spec. are thoroughly admixed and ground in a mill. A well floatable powder spray is obtained.

EXAMPLE 21 Powder spray containing 3-butoxypropyl-ammoniumethyl phosphonate (compound of the formula (8)) as active ingredient

45% of active ingredient, 49% of Ultra-sil VN 3, 3% of Dispergiermittel SI and 3% of Tensiofix LX spec. are thoroughly admixed and ground in a mill.

EXAMPLE 22 Emulsifiable concentrate containing 3-isononyloxypropyl-ammoniummethyl phosphonate (compound of the formula (1)) as active ingredient

75% of active ingredient and 25% of Emulsogen NO 90 are thoroughly admixed.

EXAMPLE 23 Emulsifiable concentrate containing tetradecyl-ammoniumethyl phosphonate as active ingredient (compound of the formula (43))

10% of active ingredient, 20% of Emulsogen NO 60 (alkyl-arylpolyglycol ether) and 70% of toluene are thoroughly admixed.

EXAMPLE 24 Emulsifiable spray mixture containing octadecyl-ammoniumethyl phosphanate as active ingredient (compound of the formula (45))

10% of active ingredient, 20% of Atlox 4857 B (a mixture of anionactive and non-ionic tenside) and 70% of monochlorobenzene are thoroughly admixed.

EXAMPLE 25 Emulsifiable spray mixture containing bis-(2-ethylhexyl)-ammoniumethyl phosphonate as active ingredient (compound of the formula (52))

40% of active ingredient, 10% of Emulsogen WO 6 and 50% of Isoforon are thoroughly admixed.

The fungicidal activity of the compound according to the invention was tested on Botrytis Cinerea and Fusarium oxysporum fungi by "partially poisoned agar plate" method.

According to this method to suspensions or solutions containing the active compounds to be tested in various concentrations the spore suspensions of the test fungi are added in a 1:1 volume ratio. The obtained combination contains the active ingredient in the desired concentration. For example if the fungicidally active compound is to be tested in a concentration of 1600 ppm, to 1 ml. of a solution containing 3200 ppm of said fungicide 1 ml. of spore suspension is added.

A potato-dextrose culture medium was prepared in a conventional way. After cooling to 60° C. 40-ml. portions of the culture medium were admixed with the solutions of the test compounds as described above. The solutions obtained were poured into Petri dishes having a diameter of 10 cm.

Of one-week old cultures of Botrytis Cinerea and Fusarium oxysporum discs having a diameter of 5 mm. were cut out. Four discs were placed into each Petri dish. The Petri dishes were incubated at 25° C. for 6 days. Evaluation was carried out by measuring the diameters of the colonies at the time when in the control dishes the colonies almost reached each other. The tests were carried out in four repetitions. The results obtained are given in the following Tables II and III.

                  TABLE II                                                         ______________________________________                                         Result of "poisoned agar plate tests" carried out on                           Botrytis Cinerea fungi                                                                   Diameter of colony (mm) in the case of                                         different concentration of active test                                         compounds                                                            Test compounds                                                                             1600 ppm 800 ppm  400 ppm                                                                               100 ppm                                   ______________________________________                                         METAXANIN                                                                      0,1-N--(2,6-dime-                                                                          16.6     16.6     16.8   17.2                                      thylphenyl)-N--                                                                (2'-methoxyace-                                                                tyl)-alanine-                                                                  methylester -EFOSITE-AL                                                        Aluminium-tris-                                                                            m        m        11.5   14.3                                      ethyl-phospho-                                                                 nate                                                                           compound of 0        0        0      1.5                                       formula (1)                                                                    compound of 11.5     11.7     11.7   12.7                                      formula (2)                                                                    compound of 11.3     11.3     11.5   12.5                                      formula (3)                                                                    compound of m        m        2.7    5.3                                       formula (4)                                                                    compound of m        m        m      2.1                                       formula (5)                                                                    compound of 0        0        0      0                                         formula (6)                                                                    compound of 0        0        0      0                                         formula (7)                                                                    compound of m        m        m      m                                         formula (8)                                                                    compound of 5.6      9.0      9.0    12.3                                      formula (9)                                                                    compound of m        m        8.7    10.5                                      formula (10)                                                                   compound of 0        9.3      9.7    10.5                                      formula (11)                                                                   compound of 5.3      5.8      5.8    10.2                                      formula (12)                                                                   compound of m        m        8.7    8.9                                       formula (13)                                                                   compound of m        m        10.2   12.3                                      formula (14)                                                                   compound of m        8.7      8.9    10.5                                      formula (15)                                                                   compound of 8.7      9.2      10.5   13.2                                      formula (16)                                                                   compound of 5.8      8.5      8.7    8.9                                       formula (17)                                                                   compound of 10.2     10.7     10.7   10.7                                      formula (18)                                                                   compound of m        m        m      m                                         formula (22)                                                                   compound of m        6.5      7.2    8.5                                       formula (25)                                                                   compound of m        m        2.7    8.5                                       formula (26)                                                                   compound of m        6.5      6.7    8.5                                       formula (42)                                                                   compound of m        2.3      3.5    4.2                                       formula (46)                                                                   compound of m        2.0      2.5    3.7                                       formula (47)                                                                   compound of m        6.5      6.7    8.2                                       formula (48)                                                                   compound of m        5.3      6.5    7.8                                       formula (49)                                                                   compound of m        3        3.5    4                                         formula (50)                                                                   compound of m        m        3.0    5.1                                       formula (54)                                                                   compound of 0        0        0      2.7                                       formula (55)                                                                   compound of 2        5.2      5.7    6.5                                       formula (62)                                                                   compound of 0        0        m      1.5                                       formula (66)                                                                   compound of 0        0        m      1.5                                       formula (67)                                                                   compound of 0        m        m      1.7                                       formula (70)                                                                   ______________________________________                                          Untreated control 16.5                                                         m  growth started but stopped after a very short time                    

                  TABLE III                                                        ______________________________________                                         Results of "poisoned agar plate tests" carried out on                          Fusarium oxysporum fungi                                                                 Diameter of colony (mm) in the case of                                         the different concentration of active                                          test compounds                                                       Test compounds                                                                             1600 ppm 800 ppm  400 ppm                                                                               100 ppm                                   ______________________________________                                         METAXANIN                                                                      0,1-N--(2,6-dime-                                                                          16.6     16.5     17.4   21.2                                      thylphenyl)-N--                                                                2'-methoxy-                                                                    acetyl)-alanine-                                                               methylester                                                                    EFOSITE-AL                                                                     Aluminium-tris-                                                                            12.5     12.5     13.0   18.5                                      ethyl-phosphonate                                                              compound of 0        0        0      0                                         formula (1)                                                                    compound of 14.6     14.6     15.8   15.8                                      formula (2)                                                                    compound of 13.9     13.8     15.3   15.3                                      formula (3)                                                                    compound of m        m        m      m                                         formula (4)                                                                    compound of m        m        m      m                                         formula (5)                                                                    compound of m        m        m      m                                         formula (6)                                                                    compound of 0        0        m      m                                         formula (7)                                                                    compound of m        m        m      m                                         formula (8)                                                                    compound of m        m        m      m                                         formula (10)                                                                   compound of 10.2     10.2     12.5   12.5                                      formula (19)                                                                   compound of 8.7      9.2      9.8    10.2                                      formula (20)                                                                   compound of 5.3      5.8      6.2    7.8                                       formula (21)                                                                   compound of m        m        m      m                                         formula (22)                                                                   compound of m        m        5.7    8.2                                       formula (23)                                                                   compound of 5.7      8.2      9.4    12.1                                      formula (24)                                                                   compound of 3.5      4.2      5.2    5.4                                       formula (25)                                                                   compound of m        m        2.7    8.8                                       formula (26)                                                                   compound of m        5.2      5.7    9.8                                       formula (27)                                                                   compound of 5.7      8.5      8.5    8.7                                       formula (28)                                                                   compound of 5.3      7.5      8.7    8.5                                       formula (29)                                                                   compound of 5.5      6.7      7.7    9.5                                       formula (30)                                                                   compound of 5.8      8.7      9.1    9.1                                       formula (31)                                                                   compound of 4.5      5.2      6.2    6.2                                       formula (32)                                                                   compound of 10.5     10.7     10.7   11.2                                      formula (33)                                                                   compound of 2.9      5.7      8.5    8.5                                       formula (34)                                                                   compound of 4.2      4.8      5.2    6.7                                       formula (35)                                                                   compound of 4.5      5.7      6.8    7.1                                       formula (36)                                                                   compound of 5.7      6.1      6.1    7.2                                       formula (38)                                                                   compound of 5.0      6.1      6.7    6.9                                       formula (39)                                                                   compound of 2.1      3.5      3.7    4.1                                       formula (40)                                                                   compound of 3.2      3.5      3.7    3.7                                       formula (41)                                                                   compound of 1.5      3.0      3.6    4.2                                       formula (42)                                                                   compound of 3.0      5.2      5.8    5.9                                       formula (43)                                                                   compound of 5.0      5.7      6.2    7.5                                       formula (44)                                                                   compound of 6.1      6.7      6.9    7.3                                       formula (45)                                                                   compound of 2.9      3.5      3.9    4.5                                       formula (46)                                                                   compound of m        2.2      3.5    4.1                                       formula (47)                                                                   compound of m        3.0      3.5    4.1                                       formula (50)                                                                   compound of 5.1      6.5      6.7    8.2                                       formula (51)                                                                   compound of 5.6      6.7      7.8    8.0                                       formula (55)                                                                   compound of 5.7      6.5      6.9    7.1                                       formula (53)                                                                   compound of 0        0        0      5.7                                       formula (52)                                                                   compound of 2.3      2.7      3.1    3.5                                       formula (56)                                                                   compound of 5.5      6.7      8.3    8.5                                       formula (57)                                                                   compound of 3.5      3.7      3.9    4.5                                       formula (58)                                                                   compound of 3.7      3.9      5.7    5.9                                       formula (59)                                                                   compound of 2.7      4.8      4.9    4.9                                       formula (60)                                                                   compound of 2.6      3.1      3.5    4.5                                       formula (61)                                                                   compound of 2        2.7      2.9    5.7                                       formula (62)                                                                   compound of 0        0        5.2    6.5                                       formula (63)                                                                   compound of 2.7      3.8      4.2    5.3                                       formula (64)                                                                   compound of m        m        2.5    3.7                                       formula (65)                                                                   compound of 0        m        m      2.7                                       formula (66)                                                                   compound of 0        m        m      m                                         formula (67)                                                                   compound of 0        m        1.5    3.2                                       formula (68)                                                                   compound of 2.7      3.8      4.2    4.7                                       formula (69)                                                                   compound of m        m        2.8    6.5                                       formula (70)                                                                   compound of 2.5      4.1      5.0    5.7                                       formula (71)                                                                   compound of 2.8      5.6      4.2    4.8                                       formula (72)                                                                   compound of 2.0      4.1      4.5    5.1                                       formula (73)                                                                   compound of 2.0      2.5      3.5    3.7                                       formula (74)                                                                   compound of 3.5      4.2      5.3    8.1                                       formula (75)                                                                   compound of 3.7      4.1      4.7    5.2                                       formula (76)                                                                   compound of 2.5      8.1      8.7    8.8                                       formula (77)                                                                   compound of 4.5      5.7      8.2    10.5                                      formula (78)                                                                   compound of 2.3      4.1      4.5    5.7                                       formula (79)                                                                   compound of 2.5      2.8      2.9    10.1                                      formula (80)                                                                   ______________________________________                                          Untreated control 12.5                                                         m  growth started but stopped after a very short time                    

The biologiccal test results unambiguously show that the compounds according to the invention exhibit fungicidal activity which generally surpasses the fungicidal activity of known structurally related compounds.

PHYTOPHTORA INFESTANS TEST

Leaf-discs of a diameter of 15 to 18 mm of apical and 2-3 leaves of tomato seedlings having 4-6 leaves grown in green-house were abscrised. The leaf-discs were placed on a filter paper and the leaves were treated on their surface with the fungicide and after drying the abaxial surface of the leaves was treated with the spray.

A double filter paper disc was placed into the bottom of Petri-dishes and a slide of a microscope was put on it in cross-form, and it was sterilized at 100° C.

After cooling the filter paper was wet with sterile distilled water. The leaf discs were placed on the slide and the suspension of the pathogen was sprayed on the leaf-discs.

The Petri dishes were incubated at 10° C. for 48 hours and then at 20°-22° C. until the symptoms occurred.

The evaluation was performed on the 4th day after the treatment.

The results were evaluated as follows:

0 no infection

1 infected surface 1-30%

2 infected surface 31-60%

3 infected surface 61-90%

4 infected surface 91-100%.

                  TABLE IV                                                         ______________________________________                                         Test results - Phytophtora infestans                                                     Evaluation in case of different active                                         ingredient concentrations                                            Active ingredient                                                                          2000 ppm 1000 ppm 500 ppm                                                                               100 ppm                                   ______________________________________                                         compound of 0        0        0.4    1.0                                       formula (1)                                                                    compound of 0        0.4      0.4    1.4                                       formula (7)                                                                    compound of 1.6      2.0      3.2    3.2                                       formula (8)                                                                    compound of 0        0        1      2                                         formula (20)                                                                   compound of 0        0        0.4    0.8                                       formula (21)                                                                   compound of 0        0        0.4    1                                         formula (60)                                                                   compound of 0        0        0.4    1                                         formula (67)                                                                   compound of 0        0        0      0.7                                       formula (52)                                                                   METAXANIN                                                                      0.1-N--(2,6-dime-                                                                          0.6      1        1      1.2                                       thyl-phenyl)-N                                                                 (2'-methoxy-                                                                   acetyl)-alanine-                                                               methylester                                                                    EFOSITE-AL                                                                     Aluminium-tris-                                                                            1.2      1.2      2.6    2.6                                       ethyl-phosphonate                                                              Infected control                                                                           4                                                                  ______________________________________                                     

We claim:
 1. Phosphoric acid monoester salts having the formula I ##STR9## wherein R₁ is a straight or branched chain alkyl having 1 to 13 carbon atoms;R₂ is alkoxyalkyl with 1 to 16 carbon atom in the alkoxy portion and 1 to 4 carbon atoms in the alkyl portion, alkenyl having 2 to 4 carbon atoms, alkinyl having 2 to 4 carbon atoms, aminoalkyl wherein the alkyl portion has from 1 to 6 carbon atoms, alkylaminoalkyl wherein the alkyl portions have 1 to 4 carbon atoms, alkylphosphonate ammoniumalkyl wherein the alkylphosphonate portion has 1 to 4 carbon atoms in the alkyl portion and the remaining alkyl has 1 to 6 carbon atoms; R₃ is hydrogen, alkenyl having 2 to 5 carbon atoms, and alkoxyalkyl wherein the alkoxy portion has 1 to 4 carbon atoms and the alkyl portion has 1 to 4 carbon atoms; R₄ is hydrogen. 